TC Systems, Inc. South Carolina - AT&T Clec Online

Version 3Q03: 11/12/2003
BST 09/29/05 AL
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be compatible with the lower capacity facility and ordered with the lower capacity
facility. This service is available as defined in NECA 4.
5.5.2 BellSouth shall make available the following channelization systems and interfaces:
5.5.2.1 DS1 Channelization System: channelizes a DS1 signal into a maximum of twentyfour
(24) DS0s. The following Central Office Channel Interfaces (COCI) are
available: Voice Grade, Digital Data and ISDN.
5.5.2.2 DS3 Channelization System: channelizes a DS3 signal into a maximum of twentyeight
(28) DS1s. A DS1 COCI is available with this system.
5.5.2.3 STS-1 Channelization System: channelizes a STS-1 signal into a maximum of
twenty-eight (28) DS1s. A DS1 COCI is available with this system.
5.5.2.4 AMI and B8ZS line coding with either Super Frame (SF) and Extended Super
Frame (ESF) framing formats will be supported as an optional feature on DS1
facilities.
5.5.3 Technical Requirements
5.5.3.1 In order to assure proper operation with BellSouth provided central office
multiplexing functionality, TC SYSTEMS’s channelization equipment must adhere
strictly to form and protocol standards. TC SYSTEMS must also adhere to such
applicable industry standards for the multiplex channel bank, for voice frequency
encoding, for various signaling schemes, and for sub rate digital access.
5.5.3.2 TR 73501 LightGate® Service Interface and Performance Specifications, Issue D,
June 1995
5.6 Dark Fiber Transport
5.6.1 Unused Transmission Media includes existing Loops and interoffice transmission
facilities both lit and unlit, defined as set forth in FCC Rule 51.319 that is not used
for existing service or maintenance of existing service or defective or in the case of
dark fiber as outlined in paragraph 5.6.2. Except as set forth in Section 5.6.3
below, BellSouth shall not be required to provide access to Dark Fiber Transport
Entrance Facilities pursuant to this Agreement.
5.6.2 Dark Fiber Transport is strands of optical fiber existing in aerial or underground
structure. BellSouth will not provide line terminating elements, regeneration or
other electronics necessary for TC SYSTEMS to utilize Dark Fiber Transport. If
the requested fiber section has any intervening (i.e., lightwave repeater
(regenerator or optical amplifier)) equipment interspliced to it BellSouth will
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